. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. FUNGI IMPERFECTI 321 study of the disease does not appear to have been reported. The carnation stem wilt,1,2 or rosette, is occasionally important both in the greenhouse and garden. As in the case of the cotton wilt and other similar dis- eases, the fungus seems to gain entrance through the root system, and its path of attack is mainly the tracheal tissues. Steriliza- tion of the soil seems to be the only effective means of Fig. 153. Fusarium on Carnation: Rosette Effe
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. FUNGI IMPERFECTI 321 study of the disease does not appear to have been reported. The carnation stem wilt,1,2 or rosette, is occasionally important both in the greenhouse and garden. As in the case of the cotton wilt and other similar dis- eases, the fungus seems to gain entrance through the root system, and its path of attack is mainly the tracheal tissues. Steriliza- tion of the soil seems to be the only effective means of Fig. 153. Fusarium on Carnation: Rosette Effect (Photograph by Geo. F. Atkinson) XXV. ROOT ROT OF THE VINE Dematophora necatrix Hartig Hartig, R. Rhizomorpha (Dematophora) necatrix n. sp. Unters. a. dem forstbot. Institut zu Miinchen. 3 : 94-141. pis. 6, 7. 1883. Viala, P. Monographie du Pourridie" des Vignes et des arbres fruitiers. 118 pp. 1 pis. 1892. Viala, P. Pourridie". Maladies de la Vigne. 248-329. figs, j4-125. 1893. There is said to exist throughout a large part of Europe and the United States a root disease of the grapevine due to the fun- gus given above. In recent years investigations in the United States have apparently failed to develop any special disease to which the characteristics usually associated with Dematophora would apply. Moreover, the studies in Europe, unfortunately, develop much conflicting evidence. It would, therefore, seem necessary before forming any final judgment in this matter to await further critical study. It is quite possible that several inde- pendent diseases are here confused. The fungus is generally de- scribed as having several types of mycelium. It is stated that 1 Atkinson, Geo. F. Carnation Diseases. Amer. Florist 8 : 720-728. 1893. 2 Sturgis, W. C. Preliminary Investigations on a Disease of Carnation. Conn. (New Haven) Agl. Exp. Sta. Rept. 21: 175-181. Please note that these images are extracted from scanned page images that may have been digitally enhanced
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